<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form method="post" enctype="multipart/form-data" action="./upload01.do">
    用户名：<input type="text" name="username"/><br/>
    密码：<input type="password" name="password"/><br/>
    自我介绍：<textarea name="introduction"></textarea><br/>
    头像：<input type="file" name="photo"><br/>
    <button type="submit">上传</button>
</form>
</body>
</html>